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Ships within 48 hours · Estimated delivery Jul 12 - Jul 17
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Description
HP EFI ECU & Harness Kits - 550-601NOverview: Looking for a plug and play alternative for your stock or built late model factory EFI engine? How about a replacement ECU for your older Holley C950? Holley has you covered. HP EFI ECU and harness kits are designed to be used with popular factory EFI engines as an alternative to the factory ECU and harness or as a replacement for your C950 ECU. The HP allows you to accurately control the fuel and ignition of your engine along with
Overview:
Looking for a plug and play alternative for your stock or built late model factory EFI engine? How about a replacement ECU for your older Holley C950? Holley has you covered. HP EFI ECU and harness kits are designed to be used with popular factory EFI engines as an alternative to the factory ECU and harness or as a replacement for your C950 ECU. The HP allows you to accurately control the fuel and ignition of your engine along with additional controls for nitrous, boost, or water meth.
Features:
NEW V2 SOFTWARE FEATURES - “Quick Start” ignition and fueling strategy for LS x Engines
- Data Logger. Scalable axes, Smoothing, Multiple graph view ability, Pre-defined notes fields and many more
- Strip Chart Real-Time Data Viewer
- Integrated Boost Control - Boost vs Time, Boost vs Gear (Time or RPM), Boost vs RPM, Boost vs Speed, Launch control. Boost launch builder, Over-boost safeties, Boost scramble
- Traction Control - Power reduction via timing, nitrous percentage or boost (Requires Davis Technologies Holley Module)
- “Quick Start” fueling for all engines
- Option for VE based fueling strategy
- Fuel Map and Learn Function Smoothing
- Configurable User Password Protection
- Fully Configurable lap top Gauge Panel
FEATURES - Optional 5.7” full-color touchscreen LCD allows easy on-the-fly tuning,data-logging or can be used as an easy to see graphical gauge panel
- Eight sequentially driven 8:2 peak and hold injector drivers, capable of driving up to 16 low or high impedance injectors as a standard feature. Multiple staged injector strategies
- Eight channel Distributorless Ignition (DIS)outputs capable of directly driving “Smart” ignition coils or Holley DIS coils. Will drive 2 wire coils with the addition of PN 554-112 high current coil driver module
- Plug and Play control of factory GM 24x and 58x LSx engines
- Integrated single channel wide band oxygen sensor control. Works with NTK or Bosch sensors
- Internal data-logging standard with a huge 2GB of memory
- 4 Stage progressive nitrous control
- Turbo boost control
- Integrated water/methanol injection control
- Self-tuning fuel table strategy greatly simplifies tuning process
- Individual cylinder fuel and spark control allows you to unlock your engine’s potential
- Works with 4, 6, 8 cylinder engines
- Unique lb/hr based fueling strategy greatly simplifies and commonizes tuning
- Advanced idle, closed loop, and enrichment strategies allow for very stable operation
- ECU is fully potted and can be mounted in the engine compartment or interior
- Sealed automotive and marine grade connectors
- Allows for use of common OEM sensors as well as customer sensor calibration input
- Ignition Plug and Play with GM 24x and 58x LSx engines, GM HEI, Ford TFI, magnetic and hall effect trigger, and other ignition systems. New Plug and Play applications in process. Custom settings can be configured to allow many other applications
- 1-5 Bar MAP sensor capability
- Two channel knock control sensor Inputs for both one or two wire knock sensors
- Dedicated fuel and oil pressure inputs
- Controls both stepper and PWM Idle Air Control (IAC) motors
- Speed density, Alpha-N, or combination fueling strategies
- 4 Programmable high or low Pulse Width Modulated (PWM) outputs and 4 fully configurable inputs can be configured for use
- 4 Stage nitrous oxide control
- Fully featured nitrous control eliminates the need for a separate nitrous controller device
- Can be configured “Wet” or “Dry” with closed loop feedback
- Progressive control based on time, RPM, or boost, requires part # 554-111
- Lean or rich safety cutoff
- Full timing retard/control configurability per stage based on RPM or time
- Integrated Water/Methanol injection control
- Uses Holley Water/Meth solenoids specially designed and calibrated for use with this EFI system to allow the user to enter Water/Meth flow as a percentage of fuel injector flow for Water/Meth tuning precision unmatched in the industry
Application:
| Year | Make | Model | Submodel | Engine Size |
|---|---|---|---|---|
| Universal |
Specs:
| Brand | Holley EFI |
|---|---|
| Emission Code | 3 |
| Ignition Type | Coil - (No Timing Control) |
| Ignition Type | GM HEI Small Cap |
| Ignition Type | Holley Dual Sync Distributor |
| Injector Connector | Jetronic / Minitimer (Bosch) |
| Product Type | HP EFI Kit |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.0 ★★★★★
Based on 224 reviews
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Product Reviews
★★★★★ 5
BEST sunscreen on the market
Size: 6 Fl Oz (Pack of 1), Style: SPF 50
This sunscreen is truly the best sunscreen on the market. I have now bought 4 bottles, and plan to purchase more. It is extremely milky, dissolves onto the skin perfectly, it feels like you arent wearing any sunscreen at all. I tell everyone I know about this product.
I also purchase the FACE spf which is even more smooth. I wish they sold this in a giant container, because I apply this everyday !!
This sunscreen has made it more accessible for me to apply sunscreen daily, it also has very minimal scent, and never burns your eyes.
Personally I will never buy another type of sunscreen again after this sunscreen.
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Reviewed in the United States on June 8, 2026
★★★★★ 5
Good for acne prone sensitive skin
Size: 3 Fl Oz (Pack of 1), Style: SPF 50
I am in my 30s with combo leaning oil and acne prone fair skin with pigmentation issues and I’m on prescription tretinoin every day. I sometimes use hydroquinone when my pigmentation issues flare up. I wear sunscreen every single day to protect my skin. It’s especially important since I’m on Tret. daily. Being that I have acne prone skin finding a sunscreen has always been a HUGE challenge for me. I’ve spent so much time on SkinSort and similar sites looking through sunscreen ingredients lists trying to find ones that won’t break me out. I’ve purchased PLENTY of k-beauty, j-beauty, EU sunscreens and Us sunscreens from Sephora and drugstore only for them to break me out. My skin is very sensitive/breakout prone to long ingredients lists, emollients, heavy textures, oils and lots of botanicals. I randomly stumbled upon this banana boat sunscreen here on Amazon and saw the short and fairly simple ingredient list that is low (not free of- but low) in occlusive ingredients in comparison to other sunscreens so I decided to order it. It has not broken me out and it feels nice. No alcohol in it, no irritation, no pimples so far. The tube is user friendly, the texture is light and pleasant and the sunscreen is affordable and accessible. I also appreciate how it’s water resistant so can be worn every day OR pool/beach. I highly recommend this to anyone with acne prone or sensitive skin if you are ok with US chemical sunscreens. I prefer chemical sunscreens over mineral sunscreens as mineral sunscreens break me out. This affordable banana boat in my opinion is WAY better for me personally than high end and expensive options that have tons of pore clogging ingredients. Yes even the popular k-beauty sunscreens break me out unfortunately. Everyone is different and anything has a potential to clog someone but for me this sunscreen is way more safe for my acne prone skin than any other sunscreen option I’ve come across. The majority of sunscreens are just packed with pore cloggers, but this banana boat one is minimal in comparison. The tube is travel size (tsa approved) but bigger than your standard 1.7oz sunscreen. This is nice for me because like I mentioned I wear sunscreen every single day and re-apply if I’ll be outside in the sun. While spending time outside I did not burn while wearing this sunscreen and I’m extremely fair skinned. I also did not notice any new pigmentation issues. The texture is nice, light and pleasant. It wears well under makeup. I normally wash my face in the AM, apply a hydrating kbeauty toner, tiny little dots of super light gel moisturizer (not much- I’m oily!) and then apply this banana boat sunscreen on top. Sometimes I wear makeup sometimes I don’t. It works both ways. I have not experienced any pilling. I have not noticed any scent with this sunscreen other than the sunscreen filters smell which isn’t too bad at all in comparison to other sunscreens I’ve tried. The sunscreen itself adds a touch of moisture but I don’t find it to be greasy on my oily skin. In the summer I will probably use a hydrating toner or serum (skip gel moisturizer) and then apply the banana boat sunscreen since I live in a warm climate. Anyways, this is a very nice textured non offensive not overly clogging (for me at least) Us chemical sunscreen that has been very unproblematic for me. I just apply a decent amount every AM and don’t even think about it. Like I mentioned if I’m out in direct sunlight (normally I’m not in the winter) I’ll reapply as needed. In the PM I use bioderma micellar water and then follow it with my Remedy brand face cleanser and it takes the banana boat off fine. I’m interested in trying the spray version (always spray decent amount into hand and then apply!) for my body in the summer. For now I apply this banana boat sensitive face to my face, neck, hands or whatever exposed area. If you tried the banana boat light as air face spf that one is a little more matte and dry but it’s also more pore clogging in both my experience and by ingredients lists. This banana boat sensitive has a bit of a different texture that’s lightweight and still not greasy but it’s more of a traditional light lotion. The banana boat light as air face one felt great but over time gave me more closed comedones. Needless to say I highly recommend this lightweight Us chemical sunscreen to anyone looking for a simple waterproof Us chemical sunscreen that is affordable and easy. Obviously no white cast as its chemical. Sorry for the long review but it might help someone out. Also I purchased this with my own money I am not a part of one of those product reviewing groups- whatever they are called. No shade to anyone lol.
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Reviewed in the United States on February 6, 2026
★★★★★ 4
Great
Size: 3 Fl Oz (Pack of 1), Style: SPF 50
The sunscreen itself is really good. It applies smoothly just as advertised “lotion”. I was pleased to see it didn’t leave a white cast. I apply makeup over my sunscreen often. This sunscreen worked perfectly with makeup. Like it said, it’s unscented and that was true as I didn’t detect a scent. My skin feels nice with this on. My only issue is that it didn’t come with a safety seal under the cap. Usually all products come with a seal to ensure it isn’t tampered with and that buyer gets the full amount of product. That was a bit upsetting but hopefully I didn’t actually get a used one.
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Reviewed in the United States on April 3, 2026
★★★★★ 5
Sheer Sensitive SPF 50 ☀️
Size: 6 Fl Oz (Pack of 1), Style: SPF 50, Size: 6 Fl Oz (Pack of 1), Style: SPF 50
Application: Specifically purchased for use on the face.
Finish: Leaves the skin feeling moisturized, not greasy.
Appearance: Blends in perfectly with no white cast.
Value: Highly concentrated formula—a little goes a long way.
Verdict: A rare mineral-based sunscreen that actually feels lightweight and looks invisible on the skin. Ideal for daily protection without the heavy, oily feel of traditional sunscreens.
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Reviewed in the United States on April 27, 2026
★★★★★ 5
I LOVE this sunscreen!! Super affordable and lightweight for your skin!
Size: 6 Fl Oz (Pack of 1), Style: SPF 50
I love this sunscreen!! Love it so much I bought 3 bottles of it!
Super lightweight and blends right into the skin, and I don’t feel not sticky!
I got super excited and got this primarily because it’s lightweight, super affordable, SPF 50 for high protection, and it said there’s no alcohol or fragrance…heres the catch tho, there IS a slight sunscreen smell, but you only notice it when applying it and if you keeping smelling it on yourself up close during the day.
Other than that, it’s truly fragrance free in the sense that you aren’t just standing there doing your thing, and keep getting HIT with the scent of sunscreen for hours, like other sunscreens! The scent is extremely light and pleasant when you go to smell it on yourself.
Don’t EVER discontinue this please please please!!!!
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Reviewed in the United States on May 26, 2026